Switch.



B. K. READ.

SWITCH.

APPLICATION FILED JUNE 26.1916.

Patented Apr. 29, 1919. 6

INVEN TOR WITNESSES:

1 ww awmw \kRQ/cmxn BY W UNITED STATES PALIENT OFFICE.

BENJAMIN K. READ, OF DETROIT, MICHIGAN, ASSIGNOR '10 HARRY W. BEGGS, OF

' VINCENNES, INDIANA.

SWITCH.

Specification of Letters Patent.

Patented Apr. 29, 1919.

Application filed June 26, 1916. Serial No. 105,883.

To all whom it may concern:

Be it known that I, BENJAMIN 'K. READ, a citizen of the United States,and residing at Detroit, in the county of Wayne and State of Michigan,have invented a new and Improved Switch, of which the following is aspecification.

This invention relates to means for changing electric circuits at thereversal of movement of revoluble shafts and its object is to provideaswitch which may be con-' 'structed at low cost, which will be effectiveand which will not get out of order.

This invention consists, in combination with a series of contacts, of aplate movable over said contacts, a shaft adapted to revolve in bothdirections, and novel means operated by said shaft to swing the plate soI as to disengage one contact and engage an- 3 is a section through oneof the operating links.

S1m1lar reference characters refer to like parts throughout the severalviews.

-, Any desired form of base 1 supports the posts 2, 3 and 4, each havinga contact plate 5 preferably provided with a slight proj ection 6.Adjacent these contacts is a post 7, preferably provided with anenlarged eccentric lower end 8 that is held in a proper socket in alower'portion 9 of the base 1 by means of a washer 10.

Revoluble on the post is a collar 12 of insulating material whichcarries a contact plate 13, preferably of spring brass and provided witha slit 14 to insure greater resilience. A collar 15 and a block 16 ofmetal are also revoluble on this post,'being positioned between theshoulder 17 and the washer 18 that is held in position by the screw 19.The collar 12'is secured to the metal collar 15 and block 16.

Slidable between the collar 15 and washer 18 is a lever 21 having a slot22 into which the block 16 extends. A shaft 23 that is re volved in anydesired manner has rigidly secured to it a stepped collar 24 having anenlarged portion 25 on which the ring 26 is revoluble. Another collar.27 has a shoulder 28 that rests on the inner end of the lever 21 whichis pivoted to the ring 26 by means of a screw 30. The collar 27 isslidable vertically on the shaft and on the key 31 and rests on thelever 21, pressing it and the ring 26a ainst the collar 24 and producingsufiicient iction to turn this ring as far as permitted by the lever.

While the shaft is turning in the direction of the arrow 33, the leverand the plate '13 will be held in the position shown in solid lines inFig. 1. But when the direction of revolution of this shaft is reversed,the

screw 30 will be carried around toward the left, the lever will slide onthe block 16 and the collars 12 and 15 and plate 13 will be turned untilthe parts reach the positions shown in dotted lines in Fig. 1.

The width of the plate 13 will determine how long it engages the contact5 connected to the post 4 after this plate engages the contact connectedto the post 2. It is easily seen that when this plate is narrower, theengagement of the plate with one of the outside contacts may ceasebefore engagement with the other begins. The drawing shows two sets ofcircuit changing devices, but i is evident that one of these sets may beomitted or that all be changed without departing fromthe spirit of myinvention.

I claim 1. In a switch, the combination of a shaft adapted to revolve ineither direction, a ring carried by the shaft, means carried by theshaft to support and frictionally engage the ring and turn .it in eitherdirection, a series of contacts, a pivotally mounted plate adapted toengage said contacts, and means connected to said ring to swing saidplate across said contacts. 4

2. In a switch, the combination of a driving member revoluble in eitherdirection, a

ring loosely mounted thereon and adapted to be carried around by thefriction between it and said driving member, a series of contacts, aplate which is movable across said contacts, and means connecting theplateto the ring whereby the ring may actuate the plate.

3. In a switch, the combination of a shaft adapted to revolve in eitherdirection, a pair of collars on the shaft, one being rigidly supportingpost, a collar of insulating material revolubly mounted thereon, a platecarried by the collar and engaging the contacts, and a lever connectedto the collar of insulating material and to said ring whereby said platemay be moved when the shaft reverses its direction and swings the lever.

4. In a switch, the combination of a shaft adapted to revolve in eitherdirection, a ring concentric with the shaft, means connected to theshaft to support the ring and to frictionally drive the same in thedirection of movement of the shaft, a base, a 0st mounted in said base,a collar revolu 1e on said post and having a narrowed extension, a

lever having a slot into which said extension projects so that saidlever may swing said collar, a pin connecting one end of said lever tosaid ring, a contact plate carried by the collar, and a series ofcontacts adapted to be the driving member, a palr of contacts, a platewhich is movable from one contact to the other, and means, connectingthe plate to the ring whereby the plate.

BENJAMIN K. READ.

ring may actuate the Y

